Henby bergsteom



H. BERGSTROM. .2 Feed-Water Apparatus for SteanrBoilers.

No. 226,021 7 Patented Mar. 30,1880.

HHHHH S, FHOTO-UTHOGQAPHER, WASHINGTON. u u

. IlNiTn STATES OF HIS RIGHT TO LUOIUS F.

HUBBARD, ()F SAME PLACE.

FEED-WATER APPARATUS FOR STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 226,021, dated March 30, 1880.

Application filed January 19, 1880.

To all whom it may concern:

Be it known that I, HENRY BERGSTROM, of Red Wing, in the county of Goodhue and State of Minnesota, have invented certain new and useful Improvements in Feed- Water Apparatus for Steam-Boilers; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the acoompanyin g drawing, which forms a part of this specification, and which represents a side elevation of an upright or vertical boiler equipped with my apparatus. 1 Myinvention relates to devices or apparatus for supplying feed-water to steam boilers and it consists in the construction and arrangement of parts, as hereinafter more fully described, having for its object to produce a regulating device for controlling the flow of feedwater to the boiler, which shall be operated by the specific gravity of the water itself, and will operate automatically, thus removing the difficulty of ascertaining the height of the water in the boiler when it foams or bubbles.

By the use of my apparatus the water will always be maintained at its proper level in the boiler, and if, through any accident to or disarrangement of the operating parts, it should fail to work, an alarm will be sounded before the water sinks so low in the boiler as to threaten danger by explosion.

In the drawing hereto annexed, A represents a steam-boiler, which may be of any size and construction. desired size, shape, and construction, which may be made of any suitable metal of the requisite strength to sustain the boiler-pressure.

By preference I make this tank of a cylindrical shape; but, if desired, it may consist simply of an enlarged pipe, or a series of pipes, or a coil of pipe, as it is only necessary that it should contain a small quantity of water; but in any case it must be of such a shape and construction as will permit the water contained in it to rise and fall readily.

The said tank B is suspended by a short chain or link from one end of a balance bar or beam, F, and communicates with the boiler A through a steam-pipe, C, and water-pipe D,

B is a tank or vessel of any which said pipes are provided with flexible pipes or joints or couplings at b b, to allow a free up-and-down motion of the tank, which is counterbalanced on its pivoted beam F by one or more adjustable weights, E e, by means of which the tank may be so elevated or adjusted as to maintain a higher or lower level of the water within it, which will, of course, always be on a level with the water in the boiler.

K is a rod, which connects tank B with a valve, I, arranged in the feed-pipe L, and N is a steam-whistle placed in the top of tank B, which operates as hereinafter set forth. 0 c are set-screws, which regulate or control the play of the balance-beam F, and an additional set-screw may be adjusted to bear against the valve-arm of the steam-whistle.

From the foregoing description, taken in connection with the drawing, the operation of 0 my invention will be readily understood.

The letters a a indicate the water line in boiler A and tank or vessel B (after its proper adjustment) when the boiler is ready for use, with steam up for startingthe engine. The pressure of steam through pipe 0, and of wa ter through pipe D, will maintain the water at the same level in the boiler and tank, and the valve I is so adjusted in its connecting-rod K that pipeLwillfeed just water enough to keep it constantly at this level during the working of the engine. Now, if the water in the boiler falls below the line a a, there will be a corresponding fall of water in tank B, when the weights E e will overbalance it and cause it to 8 5 rise, and thereby, by means of the connectingrod K, open valve 1, so as to increase the flow of water into the boiler through the feed-pipe L. If, on the other hand, the feed is too fast and the water in the boiler rises above line a 0 a, there will be a corresponding increase in tank B, which will cause it to overbalance the weights E 6, when it will sink, and thus partially close the feed-valve I and reduce the flow. If a steam feedpump is used in connec- 5 tion with the boiler, the feed maybe regulated by connecting rod K with the valve of the steam-pipe thatsupplies the cylinder of the feed-engine, causing it to work fast or slow, as occasion demands. In either case this device will operate automatically, and always maintain the waterin the boiler at the proper level, dispensing with gage-cocks and similar devices for testing the water-level in the boiler,

which are, at best, unreliable, because of the bubbling and foaming of the water, which make it ditficult to determine its exact level.

The operation of my device depending upon the weight of the water contained in tank B, and not upon its bulk or condition, it will operate with unerring' accuracy under all ordinary conditions and circumstances.

In case the water in the boiler and tank should, from any defect in the apparatus or other cause, sink to the danger point, the tank B will be elevated to such a height that the arm N of its steam-whistle N will strike against the set-screwO which opens the valve and sounds an alarm.

Having thus described myinvention, 1 claim 20 and desire to secure by Letters Patent of the -United States HENRY BER-GSTROM.

Witnesses:

L. F. HUBBARD, N. V. DODGE. 

